body,html
  line-height 1
  font-weight 200
  font-family 'PingFang SC' , 'STHeitiSC-Light' , 'Helvetica-Light' , Arial , sans-serif


.clearfix
  display inline-block
  &:after
    display block
    content "."
    height 0
    line-height 0
    clear both
    visibility hidden
